A(n) __________ character is a trait that has evolved relatively recently

a. derived
b. ancestral
c. cladistic
d. homologous
e. polyphyletic


A

Biology & Microbiology

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Cotransductant bacteria can occur if

A) a bacterial cell picks up two fragments of DNA from the environment, each with a different gene. B) double crossover occurs between prophage DNA and the bacterial chromosome. C) two genes are closely linked enough so that they can be packaged into a phage head and injected into a cell by a single phage. D) two genes are introduced into the same bacterium by simultaneous infection with two different phages. E) Both C and D

Biology & Microbiology

Most bacterial cells can keep from bursting in a hypotonic environment because of:

a. a stiff capsule. b. a rigid cell wall. c. a tough cell membrane. d. an efficient water pump. e. pumping large quantities of salts into the cell.

Biology & Microbiology

Which phylum of the Kingdom Protozoa were you least likely to observe in pond water?

A) Flagellates B) Amoebas C) Ciliates D) Apicomplexans

Biology & Microbiology

Which parts of the atoms interact in a chemical reaction?

A) protons B) neutrons C) ions D) electrons E) isotopes

Biology & Microbiology